Hourly Weather in Great Falls, Montana, United States
∙ View on Radar5 min
1 hour
6 hours
1 day
Wind
3 mph
Calm
8 mph
Light
8 mph
Light
8 mph
Light
9 mph
Light
9 mph
Light
8 mph
Light
6 mph
Light
6 mph
Light
Humidity
96%
Extremely humid
91%
Extremely humid
92%
Extremely humid
92%
Extremely humid
93%
Extremely humid
94%
Extremely humid
93%
Extremely humid
91%
Extremely humid
88%
Extremely humid
Visibility
6 mi
Good
7 mi
Good
8 mi
Good
9 mi
Good
9 mi
Good
7 mi
Good
9 mi
Good
6 mi
Fair
7 mi
Good
Pressure
1005 hPa
Low
1005 hPa
Low
1006 hPa
Low
1006 hPa
Low
1006 hPa
Low
1007 hPa
Low
1007 hPa
Low
1007 hPa
Low
1007 hPa
Low
Clouds
100%
100%
100%
100%
100%
100%
100%
100%
100%
Dew point
38°
37°
37°
36°
36°
36°
35°
36°
36°
UV Index
0
0
0
0
0
0
0
0
0
Air quality
27
Good
27
Good
26
Good
26
Good
31
Good
36
Good
39
Good
38
Good
30
Good
Pollen index
Tree
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
Weed
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
Grass
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
Pollutants
Low risk
High risk
PM10
0.28 μg/ft3
0.21 μg/ft3
0.27 μg/ft3
0.32 μg/ft3
0.37 μg/ft3
0.43 μg/ft3
0.43 μg/ft3
0.39 μg/ft3
0.23 μg/ft3
PM25
0.18 μg/ft3
0.14 μg/ft3
0.18 μg/ft3
0.21 μg/ft3
0.24 μg/ft3
0.28 μg/ft3
0.28 μg/ft3
0.25 μg/ft3
0.15 μg/ft3
NO2
0.5 ppb
0.48 ppb
0.45 ppb
0.43 ppb
0.44 ppb
0.45 ppb
0.46 ppb
0.41 ppb
0.37 ppb
SO2
N/A
0.02 ppb
0.02 ppb
0.02 ppb
0.03 ppb
0.03 ppb
0.03 ppb
0.03 ppb
0.02 ppb
CO
0.13 ppb
0.12 ppb
0.12 ppb
0.12 ppb
0.12 ppb
0.12 ppb
0.12 ppb
0.12 ppb
0.12 ppb
O3
29 ppb
26.86 ppb
26.24 ppb
25.61 ppb
25.99 ppb
26.37 ppb
26.75 ppb
28.03 ppb
29.3 ppb